Generally, a download manager enables downloading of large files or multiples files in one session.
Many web browsers, such as Internet Explorer 9, include a download manager.
Stand-alone download managers also are available, including the Microsoft Download Manager.

if you do not have a download manager installed, and still want to download the file(s) you've chosen, please note:

You may not be able to download multiple files at the same time.
In this case, you will have to download the files individually.
(You would have the opportunity to download individual files on the "Thank you for downloading" page after completing your download.)

Files larger than 1 GB may take much longer to download and might not download correctly.

You might not be able to pause the active downloads or resume downloads that have failed.

The Microsoft Download Manager solves these potential problems.
It gives you the ability to download multiple files at one time and download large files quickly and reliably.
It also allows you to suspend active downloads and resume downloads that have failed.

Microsoft SQL Server 2008 Service Pack 2 (SP2) is now available for download. These packages
may be used to upgrade any edition of SQL Server 2008. We remain committed to providing
our customers with essential changes via Service packs. Service Pack 2 contains
updates for SQL Server Utility, Data-Tier Application (DAC), as well as
integration capability for Microsoft Reporting Services with the Microsoft
SharePoint 2010 Technologies. Service Pack 2 introduces support for a maximum of 15,000 partitions
in a database, and includes SQL Server 2008 SP1 Cumulative Update 1 to 8. While keeping product changes contained, we have made significant investments to ease deployment and management of Service Packs.
Microsoft SQL Server 2008 Service Pack 1 is not a prerequisite for installing
SQL Server 2008 Service Pack 2.

SQL Server 2008 Instance Management.With SP2 applied, an instance of the SQL Server 2008 Database Engine can be enrolled with a SQL Server 2008 R2 Utility Control Point as a managed instance of SQL Server. For more information, see Overview of SQL Server Utility in SQL Server 2008 R2 Books Online.

Data-tier Application (DAC) Support.Instances of the SQL Server 2008 Database Engine support all DAC operations delivered in SQL Server 2008 R2 after SP2 has been applied. You can deploy, upgrade, register, extract, and delete DACs. SP2 does not upgrade the SQL Server 2008 client tools to support DACs. You must use the SQL Server 2008 R2 client tools, such as SQL Server Management Studio, to perform DAC operations. A data-tier application is an entity that contains all of the database objects and instance objects used by an application. A DAC provides a single unit for authoring, deploying, and managing the data-tier objects. For more information, see Designing and Implementing Data-tier Applications.

Please Note: SQL Server 2008 SP2 applies only to the SQL Server 2008 release. This service pack can not be applied on top of SQL Server 2008 R2.